Glutathione vs Spermidine
A side-by-side research comparison of Glutathione and Spermidine across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Glutathione | Spermidine |
|---|---|---|
| Full name | L-Glutathione (Reduced) | Spermidine (Polyamine) |
| Category | Anti-Aging | Anti-Aging |
| Status | Supplement / Injectable | Dietary compound (research ongoing) |
| Mechanism | Directly neutralizes free radicals, regenerates vitamins C and E, supports phase II liver detoxification, maintains cellular redox balance, and protects mitochondrial DNA. | Induces autophagy, partly by inhibiting acetyltransferase activity and mimicking caloric restriction signaling. This promotes clearance of damaged proteins and organelles, supporting cellular renewal, cardiovascular health, and cognition. |
| Molecular weight | 307.32 Da | 145.25 Da |
| Half-life | ~1.5-2 hours (IV/IM) | Short; rapidly absorbed and distributed |
| Bioavailability | ~95% injectable; low oral (~3%) | Oral absorption reported; also produced by gut bacteria |
| Typical dose | 200-600 mg | 1-10 mg per day |
| Frequency | 1-3x per week | Once daily |
| Route | IV push, IM injection, or nebulized | Oral |
Glutathione reported benefits
- Powerful antioxidant protection
- Liver detoxification support
- Skin brightening
- Immune system support
- Anti-aging cellular protection
- Heavy metal chelation
Spermidine reported benefits
- Induces autophagy (cellular clean-up)
- Cardiovascular support
- Cognitive and memory support (research)
- May support hair and overall longevity
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Research and educational reference only. Not medical advice.